My programme doesnot count digits after 9 digits

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//Calculates number of digits in an integer using while and do

#include <stdio.h>

int main(void)

{
    int digits  = 0, num;

    printf("Enter a nonnegative integer: ");
    scanf("%d", &num);

    do{
        num /= 10;
        digits++;
      }
    while (num > 0);

    printf("Number of digits in your integer is %d\n", digits);

    return 0;
}

What I have tried:

When i enter 11 digit intiger it shows 1 digit

Posted 29-Jun-18 6:50am

Member 13892651

Updated 29-Jun-18 8:48am

jeron1

v2

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Rick York 29-Jun-18 20:11pm

It would be easier to accept input as a string and then count the numbers.

2 solutions

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Clifford Nelson · Answer 1 · 2018-06-29T06:58:00

Solution 1

My guess is that is because you are converting the value to an int.

An int variable stores the actual binary value of the integer it is assigned. In the declaration of int x = 564, the variable x stores the binary value of the integer number 564. An int variable can store 4 bytes of data, which means the value of an int can hold range between -2,147,483,648 and +2,147,483,647

if you entered "1111111111" you would actually count to 10, not 9

Posted 29-Jun-18 6:58am

Clifford Nelson

Updated 29-Jun-18 7:10am

v2

Comments

Member 13892651 30-Jun-18 1:10am

How would i fix this

Clifford Nelson 1-Jul-18 2:51am

I am no expert in C, but it appears you need to read a string:
gets( str );
and to get the length
strlen(str );
As I said I am no expert in C

Patrice T · Answer 2 · 2018-06-29T08:50:00

Quote:
When i enter 11 digit intiger it shows 1 digit

With the debugger, you will see what your code is doing, pay attention to variables values.

Your code do not behave the way you expect, and you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
1.11 — Debugging your program (stepping and breakpoints) | Learn C++[^]
The debugger is here to only show you what your code is doing and your task is to compare with what it should do.

My programme doesnot count digits after 9 digits

2 solutions

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My programme doesnot count digits after 9 digits

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